Concrete-pipe machine.



A. H. SANDERS & 0. HOOD.

CONCRETEPIPE MACHINE. APPLICATION FILED DEC. 7. 1914.

1,158,391. Patented 'Ot. 26, 1915.

2 SHEETS-SHEET I.

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COLUMBIA PLANOORAPH $0., WASHINGTON, D. c.

A. H. SANDERS & O. HOOD.

CONCRETE PIPE MACHINE.

APPLICATION FILED DEC. 7, 1914.

5 1 9 1 ,T 6H 2% ATUS T on H d m n 6 b 9w D1 7,9 01am .iiaoaf ALBERT H. SANDERS AND OLLIE HOOD, OIE GLENIDORA, CALIFORNIA.

CONCRETE-PIPE MACHINE.

Application filed December 7,1914.

To all whom it may concern. 1

Be it known that we, ALBERT H. SANDERS and OLLIE H001), citizens of the United States, both residing at Glendora, in the county of Los Angeles and State of California, have invented a new and useful Concrete-Pipe Machine, of which the following is a specification.

Our invention relates to concrete pipe machines, and the principal object of the invention is to provide means for economically producing concrete pipe.

In the use of concrete pipe it is highly desirable to produce it where it is to be used,

as the cement usually forms from one third to one quarter the bulk of the ooncrete,the remaining material being generally avail able near where the pipe is used. The cost of transporting material is very much less than the cost of transporting pipe, and it has been found that pipe produced at a point conveniently located near where it is used is most economical. In producing such pipe, metal forms are commonly used and it is necessary for the production of large quantities of pipe from a few forms that the con crete be mixed with a minimum of water and tamped or otherwise compacted in the forms so that it forms a pipe which will stand alone without the forms. a

A further object of our invention is to provide means for compressing or tamping such a dry mixture, care being taken, of course, to see that suiiicient'water is added to insure proper setting of the concrete.

lVe have found that the best way to compact the concrete is to compress it a little at a time by rolling, and a further object of the invention is to provide means for compacting and rolling the concrete so as to form a homogeneous and solid pipe.

In the practical use of such pipe it is desirable to form one end of the pipe with an annular recess and the other end of the pipe with a projecting lip adapted to lit-into a similar recess on an adjacent pipe, and a further object of our invention is to provide means for producing such a recess and lip.

Further objects and advantages will be made evident hereinafter.

In the drawings, which are for illustrative purposes only: Figure 1 is a plan view of a portion of the machine. Fig. is an elevation on the plane -00 of Fig. 1. Fig. 3 is a sectional detail of a portion-of the invention, Fig. 4 is an inverted plan Specification of Letters Patent.

Patented oet. 2e, 191.5. Serial N0. 875,980. M

view showing the mechanism under the floor. Fig. 5 is an enlarged view of a portion of the invention shown in Fig. 2. Fig. 6 is a plan view on the plane w-w of Fig. 5, looking in the direction of the arrows. Fig. is an enlarged section on the plane w a of Fig. 6, looking in the direction of the arrows. Fig. 8 is a view of two joints of concrete pipe as installed, a portion thereof being shown in section to better illustrate the invention.

The invention consists of a frame 11 upon which is placed a floor 12, the frame 11 and the floor 12 being part of a portable machine, which can be rolled on a truck, or which is provided with wheels so that it may be readily transported from place to place. A gasolene engine, not shown, is also placed 011 the truck for the purpose of driving the concrete pipe machine.

The concrete pipe is formed in a space 13 between an inner form 14: and an outer form 15, the outer form 15 being formed in two halves so that it can be removed from the outer surface of the pipe when the pipe is completed, and the inner form 14 being collapsible so that it can be removed from the inner surface of the pipe when the pipe is complete. A bottom ring 16 is placed in the bottom of the space 13, this ring having the form shown in Fig. 7, and being provided for the purpose of forming an outer lip 18 on the lower end of the pipe, as shown in Fig. 8. A mixing cylinder 19 is provided, this cylinder having a slightly larger internal diameter than the expanded dimension of the inner form 14;. Secured near the lower edge of the cylinder 19, by means of rivets 20, are two or more shoes .21,'these shoes carrying rollers and being provided with feeding planes 23. The rollers 22 have the form shown in Fig. 7, being pivoted on a pin 24 which passes through and is secured in the shoe 21, a lock nut 25 being provided for this purpose. The shape of the rollers is such that they roll the concrete to produce an inner lip 26, as shown at the upper end of the pipe shown in Fig. 8. The upper end of the cylinder 19 is secured to a casting 29 in which a square stem 30 is fastened by means of a set screw 31, this square stem passing upwardly along the axis of the cylinder 19 and forming the driving means for that cylinder and its connected shoes and rollers. The square stem 30 passes through a square recess in the hub 32 of a bevel gear 33, this hub turning freely in a bearing 31 and being held in position by a collar 35 and'a set screw 36. The stem 30 7 also passes upwardly and through a nut 37 having a square opening therein, this nut being secured in a bearing 38 by means of a collar 39 and-a set screw 40. The bearing 34: is, secured in a cross brace 11 of the frame 11 and the bearing 38 is secured in a cross brace 12 of the frame 11, these cross braces being secured to uprights 13 or being sup- ;ported by any other convenient means. The bevel gear 33 is driven by means of a bevel pinion 44 which is keyed to a shaft secured in bearings 46 attached to the frame 1 11, a pulley 17 also-being keyed to the shaft 15 and being driven by a belt '118'from a gaso- .lene engine, not shown, or from any other convenient means. The outer form 15 is hinged at 419, as shown in Fig. 6, and is provided with a standard toggle fastening 50. The inner form 1 1 is overlapped, as shown .at 51, and is provided with a toggle fastening- 52, the toggle fastenings 50 and 52 being standardin the art and being in regular 25 use in forms now used for this purpose. A

- hopper 53 is provided with an encircling band 51 which fits tightly over the top of the outer form 15 in its clamped position. A projecting ledge 55 is provided on the lower 80 end ofthe outer form 15, and this ledge may be gripped by blocks 56 having small ledges 57 formed thereon which extend over and restrain the ledge 55. The blocks 56 are -actuated by a pair of rods 58 which pass 35 through apertures 59 in the floor 12 and which are secured at 60 to a lever 61 turning on a pin 62 carried in a bearing plate 63 which is secured to the underside of the floor '12. The lever 61 is provided with an exten- 40 sion' 64: to which is secured a rod 65 which 7 extends over under the floor and is pivoted on a pin- 66 carried on an extension 67 formed on a lever 68. a The lever 68 is pivoted on a shaft 69 which is carried on a bearing mem- 45 her 70 having a toothed quadrant 71 formed thereon. A pawl 72 is formed on a bolt 73 which slides in a recess 74 formed on a projection 75 on the lever 68. A collar 76 is also formed on the bolt 73, and a compres- 50 sion spring 77 tends to hold this bolt in its -lower position. A pull rod 78 is secured to the upper end of the bolt 73 and extends upwardly to a grip 79 pivoted on a pin 80 carried on the upper end of the lever 68 which 55 has a handle 81 formed thereon.

The method of operation of the invention I is'as follows: The inner formis set up as shown in Fig. 6, the toggle 52 being set by means of a handle indicated by dotted lines at v82, this handle projecting outwardly from 7a shaft 83 by which the toggle is actuated. ,-The outer form 15 is then'locked in place by means of-the toggle mechanism 50, this togvgle mechanism being operated by a handle 8e shown in dotted lines in Fig; 6, this releasing the ledge handle 81 and the handle 82 being in reality above the plane as -03 of Fig. 5, and therefore not properly belonging to this figure, but being added for the sake of clearness. The ring 16 is then dropped in place and the cylinder 19 is lowered to the bottom of the space 13, the roller 22 resting on the ring 16. A quantity of concrete is then placed in the hopper 53 and in the space 13, approximately as shown in Fig. 2. This concrete is suppliedwith a minimum amount of water so that it has quite a solid consistency and does not tend to run freely.

The pulley 47 is then rotated by the belt 18 from any convenient means, and the stem 30 is rotated through the bevel gear 33, the bevel pinion 414 and the shaft The cylinder 19 therefore rotates in the direction of the arrow shown in Fig. 5. As the shoes 21 move in the direction of the arrow shown in Fig. 5, the feeding planes 23 force the body of concrete downwardly and tend to lift the cylinder 19, this tendency being resisted by the weight of the cylinder and its attached parts. The concrete which is partially compacted by the feeding planes 23 is further pressed downwardly by the rollers 22 which press upon it with an even pressure and tend to produce a homogeneous structure. -The weight of the cylinder 19 and its connected parts is such, and the angle of the feeding planes 23 is made such, that the cylinder 19 gradually climbs upwardly constantly feeding the concrete downwardly through the space 13 and compacting it into the bottom of that space. We have found that an upward feed of about one-half inch per revolution, on ordinary sizes of concrete pipe, is suflicient to produce a very uniform homogeneous pipe of maximum strength. As it is necessary to mix the concrete of a suflicient consistency to stand alone when the forms are removed, if the work is to be carried on with a few forms, it is absolutely essential that the concrete should be forced very closely together if a uniform section of pipe is to be produced. TVhen the cylinder 19 has been forced upwardly to the full height of the inner form 11, the hopper 53 is removed and ,1;

any superfluous concrete is taken away. The pawl 72 is then released by pressing on the grip 79 and rotating the lever 68 from the position A of Fig. 3 to the position B of that figure.

forcing the rods 58 in a direction opposite the arrows shown in Fig. 1, and pushing the blocks 56 away from the form 15, thereby The molded pipe and the forms with the ring 16 are then removed from the machine and placed at any convenient location for setting. The toggle 50 is released by rotating the handle 84 in the direction shown by the arrow in Fig. 6,

This rotates the lever 61 in a countercloclnvise direction about the pin 62,

the form 15 turning about the hinge 19 and thereby being released from the exterior surface of the pipe. The form may then be removed from the pipe. The toggle 52 is then released by turning the handle 82 in the direction of the arrow shown in Fig. 6, the inner form 1 1 being thereby contracted in diameter so that it may be easily withdrawn from the inside of the pipe. The pipe in its finished form is then left standing on the ring 16, and is allowed to stand until it thoroughly sets, being suitably moistened during this time if necessary. The forms 14: and 15 may then be replaced in the machine, a new ring 16 provided, and the operation may be repeated. The pipe sections are placed together, as shown in Fig. 8, the inner lip 26 of one section fitting inside the outer lip 18 of the other section.

We claim as our invention 1. A machine for forming concrete pipe comprising an inner form, an outer form, a series of rollers between said forms, an intermediate cylinder between said forms, shoes having a feeding plane on the forward end thereof, means for pivoting each of said rollers in one of said shoes, means for feed ing concrete into the space between said forms, and means for rotating said cylinder.

2. A machine for forming concrete pipe comprising an inner form, an outer form, a series of rollers between said forms, an intermediate cylinder between said forms, shoes having a feeding plane on the for ward end thereof, means for pivoting each of said rollers in one of said shoes, a feeding hopper so placed that it can feed concrete into the space between said forms, and means for rotating said cylinder.

3. A machine for forming concrete pipe comprising an inner form, an outer form, a series of rollers between said forms, an intermediate cylinder between said forms, shoes having a feeding plane on the forward end thereof, means for pivoting each of said rollers in one of said shoes, means for feeding concrete into the space between said forms, a stem secured axially to the top of said cylinder, and means for rotating said stem.

4. A machine for forming concrete pipe comprising an inner form, an outer form, a series of rollers between said forms, an intermediate cylinder between said forms, shoes having a feeding plane on the forward end thereof, means for pivoting each of said rollers in one of said shoes, a feeding hopper so placed that it can feed concrete into the space between said forms, a stem secured axially to the top of said cylinder, and means for rotating said stem.

5. A machine for forming concrete pipe comprising an inner form, an outer form, a series of rollers between said forms, an in termediate cylinder between said forms, shoes having a feeding plane on the forward end thereof, means for pivoting each of said rollers in one of said shoes, means for feeding concrete into the space between said forms, a square stem secured axially to the top of said cylinder, a nut through which said square stem can slide axially, and means for rotating said nut.

6. A machine for forming concrete pipe comprising an inner form, an outer form, a series of rollers between said forms, an intermediate cylinder between said forms, shoes having a feeding plane on the forward end thereof, means for pivoting each of said rollers in one of said shoes, a feeding hopper so placed that it can feed concrete into the space between said forms, a square stem secured axially to the top of said cylinder, a nut through which said square stem can slide axially, and means for rotating said nut..

7. A machine for forming concrete pipe comprising an inner form, an outer form, a series of rollers between said forms, an intermediate cylinder between said forms, shoes having a feeding plane on the forward end thereof, means for pivoting each of said rollers in one of said shoes, means for feeding concrete into the space between said forms, and driving means for rotating said cylinder, said driving means being so formed that said cylinder can move axially without restraint from said driving means.

8. A machine for forming concrete pipe comprising an inner form, an outer form, a series of rollers between said forms, an intermediate cylinder between said forms, shoes having a feeding plane on the forward end thereof, means for pivoting each of said rollers in one of said shoes, a feeding hopper so placed that it can feed concrete into the space between said forms, and driving means for rotating said cylinder, said driving means being so formed that said cylinder can move axially without restraint from said driving means.

9. In a concrete pipe machine, a compacting member comprising a shoe having a feeding plane formed on the forward end thereof, and a pivoted roller carried in said shoe behind said feeding plane.

In testimony whereof, we have hereunto set our hands at Los Angeles, California, this 30th day of November, 1914.

ALBERT H. SANDERS. OLLIE HOOD.

In presence of- FRED A. MANSFIELD, FORD A. HARRIS.

flopies of this patent may be obtained for five cents each, by addressing the Commissioner of latents, Washington, D. 0." 

